Pull Up Pull Down

Although you can solder the wires and add a resistor to create a pull down/up switch for the Circuit Playground Express it is much faster to take advantage of built in capabilities.

Switch two uses a 100 K resistor. Switch one uses the code below.
Switch one is connected to pin A1 and is set internally as pullup. Switch Two is connected to pin A3 and has a soldered pullup resistor.